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ce443ab5 G |
1 | /* |
2 | * Frame Buffer Driver for PKUnity-v3 Unigfx | |
3 | * Code specific to PKUnity SoC and UniCore ISA | |
4 | * | |
5 | * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> | |
6 | * Copyright (C) 2001-2010 Guan Xuetao | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/errno.h> | |
ce443ab5 G |
16 | #include <linux/platform_device.h> |
17 | #include <linux/clk.h> | |
18 | #include <linux/fb.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/console.h> | |
fbc6c4a1 | 21 | #include <linux/mm.h> |
ce443ab5 G |
22 | |
23 | #include <asm/sizes.h> | |
fbc6c4a1 | 24 | #include <asm/pgtable.h> |
ce443ab5 G |
25 | #include <mach/hardware.h> |
26 | ||
27 | /* Platform_data reserved for unifb registers. */ | |
28 | #define UNIFB_REGS_NUM 10 | |
29 | /* RAM reserved for the frame buffer. */ | |
30 | #define UNIFB_MEMSIZE (SZ_4M) /* 4 MB for 1024*768*32b */ | |
31 | ||
32 | /* | |
33 | * cause UNIGFX don not have EDID | |
34 | * all the modes are organized as follow | |
35 | */ | |
36 | static const struct fb_videomode unifb_modes[] = { | |
37 | /* 0 640x480-60 VESA */ | |
38 | { "640x480@60", 60, 640, 480, 25175000, 48, 16, 34, 10, 96, 1, | |
39 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
40 | /* 1 640x480-75 VESA */ | |
41 | { "640x480@75", 75, 640, 480, 31500000, 120, 16, 18, 1, 64, 1, | |
42 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
43 | /* 2 800x600-60 VESA */ | |
44 | { "800x600@60", 60, 800, 600, 40000000, 88, 40, 26, 1, 128, 1, | |
45 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
46 | /* 3 800x600-75 VESA */ | |
47 | { "800x600@75", 75, 800, 600, 49500000, 160, 16, 23, 1, 80, 1, | |
48 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
49 | /* 4 1024x768-60 VESA */ | |
50 | { "1024x768@60", 60, 1024, 768, 65000000, 160, 24, 34, 3, 136, 1, | |
51 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
52 | /* 5 1024x768-75 VESA */ | |
53 | { "1024x768@75", 75, 1024, 768, 78750000, 176, 16, 30, 1, 96, 1, | |
54 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
55 | /* 6 1280x960-60 VESA */ | |
56 | { "1280x960@60", 60, 1280, 960, 108000000, 312, 96, 38, 1, 112, 1, | |
57 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
58 | /* 7 1440x900-60 VESA */ | |
59 | { "1440x900@60", 60, 1440, 900, 106500000, 232, 80, 30, 3, 152, 1, | |
60 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
61 | /* 8 FIXME 9 1024x600-60 VESA UNTESTED */ | |
62 | { "1024x600@60", 60, 1024, 600, 50650000, 160, 24, 26, 1, 136, 1, | |
63 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
64 | /* 9 FIXME 10 1024x600-75 VESA UNTESTED */ | |
65 | { "1024x600@75", 75, 1024, 600, 61500000, 176, 16, 23, 1, 96, 1, | |
66 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
67 | /* 10 FIXME 11 1366x768-60 VESA UNTESTED */ | |
68 | { "1366x768@60", 60, 1366, 768, 85500000, 256, 58, 18, 1, 112, 3, | |
69 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
70 | }; | |
71 | ||
a7582733 | 72 | static const struct fb_var_screeninfo unifb_default = { |
ce443ab5 G |
73 | .xres = 640, |
74 | .yres = 480, | |
75 | .xres_virtual = 640, | |
76 | .yres_virtual = 480, | |
77 | .bits_per_pixel = 16, | |
78 | .red = { 11, 5, 0 }, | |
79 | .green = { 5, 6, 0 }, | |
80 | .blue = { 0, 5, 0 }, | |
81 | .activate = FB_ACTIVATE_NOW, | |
82 | .height = -1, | |
83 | .width = -1, | |
84 | .pixclock = 25175000, | |
85 | .left_margin = 48, | |
86 | .right_margin = 16, | |
87 | .upper_margin = 33, | |
88 | .lower_margin = 10, | |
89 | .hsync_len = 96, | |
90 | .vsync_len = 2, | |
91 | .vmode = FB_VMODE_NONINTERLACED, | |
92 | }; | |
93 | ||
94 | static struct fb_fix_screeninfo unifb_fix = { | |
95 | .id = "UNIGFX FB", | |
96 | .type = FB_TYPE_PACKED_PIXELS, | |
97 | .visual = FB_VISUAL_TRUECOLOR, | |
98 | .xpanstep = 1, | |
99 | .ypanstep = 1, | |
100 | .ywrapstep = 1, | |
101 | .accel = FB_ACCEL_NONE, | |
102 | }; | |
103 | ||
104 | static void unifb_sync(struct fb_info *info) | |
105 | { | |
106 | /* TODO: may, this can be replaced by interrupt */ | |
107 | int cnt; | |
108 | ||
109 | for (cnt = 0; cnt < 0x10000000; cnt++) { | |
110 | if (readl(UGE_COMMAND) & 0x1000000) | |
111 | return; | |
112 | } | |
113 | ||
114 | if (cnt > 0x8000000) | |
115 | dev_warn(info->device, "Warning: UniGFX GE time out ...\n"); | |
116 | } | |
117 | ||
118 | static void unifb_prim_fillrect(struct fb_info *info, | |
119 | const struct fb_fillrect *region) | |
120 | { | |
121 | int awidth = region->width; | |
122 | int aheight = region->height; | |
123 | int m_iBpp = info->var.bits_per_pixel; | |
124 | int screen_width = info->var.xres; | |
125 | int src_sel = 1; /* from fg_color */ | |
126 | int pat_sel = 1; | |
127 | int src_x0 = 0; | |
128 | int dst_x0 = region->dx; | |
129 | int src_y0 = 0; | |
130 | int dst_y0 = region->dy; | |
131 | int rop_alpha_sel = 0; | |
132 | int rop_alpha_code = 0xCC; | |
133 | int x_dir = 1; | |
134 | int y_dir = 1; | |
135 | int alpha_r = 0; | |
136 | int alpha_sel = 0; | |
137 | int dst_pitch = screen_width * (m_iBpp / 8); | |
138 | int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8); | |
139 | int src_pitch = screen_width * (m_iBpp / 8); | |
140 | int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8); | |
141 | unsigned int command = 0; | |
142 | int clip_region = 0; | |
143 | int clip_en = 0; | |
144 | int tp_en = 0; | |
145 | int fg_color = 0; | |
146 | int bottom = info->var.yres - 1; | |
147 | int right = info->var.xres - 1; | |
148 | int top = 0; | |
149 | ||
150 | bottom = (bottom << 16) | right; | |
151 | command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16) | |
152 | | (x_dir << 20) | (y_dir << 21) | (command << 24) | |
153 | | (clip_region << 23) | (clip_en << 22) | (tp_en << 27); | |
154 | src_pitch = (dst_pitch << 16) | src_pitch; | |
155 | awidth = awidth | (aheight << 16); | |
156 | alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff) | |
157 | | (alpha_sel << 16); | |
158 | src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16); | |
159 | dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16); | |
160 | fg_color = region->color; | |
161 | ||
162 | unifb_sync(info); | |
163 | ||
164 | writel(((u32 *)(info->pseudo_palette))[fg_color], UGE_FCOLOR); | |
165 | writel(0, UGE_BCOLOR); | |
166 | writel(src_pitch, UGE_PITCH); | |
167 | writel(src_offset, UGE_SRCSTART); | |
168 | writel(dst_offset, UGE_DSTSTART); | |
169 | writel(awidth, UGE_WIDHEIGHT); | |
170 | writel(top, UGE_CLIP0); | |
171 | writel(bottom, UGE_CLIP1); | |
172 | writel(alpha_r, UGE_ROPALPHA); | |
173 | writel(src_x0, UGE_SRCXY); | |
174 | writel(dst_x0, UGE_DSTXY); | |
175 | writel(command, UGE_COMMAND); | |
176 | } | |
177 | ||
178 | static void unifb_fillrect(struct fb_info *info, | |
179 | const struct fb_fillrect *region) | |
180 | { | |
181 | struct fb_fillrect modded; | |
182 | int vxres, vyres; | |
183 | ||
184 | if (info->flags & FBINFO_HWACCEL_DISABLED) { | |
185 | sys_fillrect(info, region); | |
186 | return; | |
187 | } | |
188 | ||
189 | vxres = info->var.xres_virtual; | |
190 | vyres = info->var.yres_virtual; | |
191 | ||
192 | memcpy(&modded, region, sizeof(struct fb_fillrect)); | |
193 | ||
194 | if (!modded.width || !modded.height || | |
195 | modded.dx >= vxres || modded.dy >= vyres) | |
196 | return; | |
197 | ||
198 | if (modded.dx + modded.width > vxres) | |
199 | modded.width = vxres - modded.dx; | |
200 | if (modded.dy + modded.height > vyres) | |
201 | modded.height = vyres - modded.dy; | |
202 | ||
203 | unifb_prim_fillrect(info, &modded); | |
204 | } | |
205 | ||
206 | static void unifb_prim_copyarea(struct fb_info *info, | |
207 | const struct fb_copyarea *area) | |
208 | { | |
209 | int awidth = area->width; | |
210 | int aheight = area->height; | |
211 | int m_iBpp = info->var.bits_per_pixel; | |
212 | int screen_width = info->var.xres; | |
213 | int src_sel = 2; /* from mem */ | |
214 | int pat_sel = 0; | |
215 | int src_x0 = area->sx; | |
216 | int dst_x0 = area->dx; | |
217 | int src_y0 = area->sy; | |
218 | int dst_y0 = area->dy; | |
219 | ||
220 | int rop_alpha_sel = 0; | |
221 | int rop_alpha_code = 0xCC; | |
222 | int x_dir = 1; | |
223 | int y_dir = 1; | |
224 | ||
225 | int alpha_r = 0; | |
226 | int alpha_sel = 0; | |
227 | int dst_pitch = screen_width * (m_iBpp / 8); | |
228 | int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8); | |
229 | int src_pitch = screen_width * (m_iBpp / 8); | |
230 | int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8); | |
231 | unsigned int command = 0; | |
232 | int clip_region = 0; | |
233 | int clip_en = 1; | |
234 | int tp_en = 0; | |
235 | int top = 0; | |
236 | int bottom = info->var.yres; | |
237 | int right = info->var.xres; | |
238 | int fg_color = 0; | |
239 | int bg_color = 0; | |
240 | ||
241 | if (src_x0 < 0) | |
242 | src_x0 = 0; | |
243 | if (src_y0 < 0) | |
244 | src_y0 = 0; | |
245 | ||
246 | if (src_y0 - dst_y0 > 0) { | |
247 | y_dir = 1; | |
248 | } else { | |
249 | y_dir = 0; | |
250 | src_offset = (src_y0 + aheight) * src_pitch + | |
251 | src_x0 * (m_iBpp / 8); | |
252 | dst_offset = (dst_y0 + aheight) * dst_pitch + | |
253 | dst_x0 * (m_iBpp / 8); | |
254 | src_y0 += aheight; | |
255 | dst_y0 += aheight; | |
256 | } | |
257 | ||
258 | command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16) | | |
259 | (x_dir << 20) | (y_dir << 21) | (command << 24) | | |
260 | (clip_region << 23) | (clip_en << 22) | (tp_en << 27); | |
261 | src_pitch = (dst_pitch << 16) | src_pitch; | |
262 | awidth = awidth | (aheight << 16); | |
263 | alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff) | | |
264 | (alpha_sel << 16); | |
265 | src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16); | |
266 | dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16); | |
267 | bottom = (bottom << 16) | right; | |
268 | ||
269 | unifb_sync(info); | |
270 | ||
271 | writel(src_pitch, UGE_PITCH); | |
272 | writel(src_offset, UGE_SRCSTART); | |
273 | writel(dst_offset, UGE_DSTSTART); | |
274 | writel(awidth, UGE_WIDHEIGHT); | |
275 | writel(top, UGE_CLIP0); | |
276 | writel(bottom, UGE_CLIP1); | |
277 | writel(bg_color, UGE_BCOLOR); | |
278 | writel(fg_color, UGE_FCOLOR); | |
279 | writel(alpha_r, UGE_ROPALPHA); | |
280 | writel(src_x0, UGE_SRCXY); | |
281 | writel(dst_x0, UGE_DSTXY); | |
282 | writel(command, UGE_COMMAND); | |
283 | } | |
284 | ||
285 | static void unifb_copyarea(struct fb_info *info, const struct fb_copyarea *area) | |
286 | { | |
287 | struct fb_copyarea modded; | |
288 | u32 vxres, vyres; | |
289 | modded.sx = area->sx; | |
290 | modded.sy = area->sy; | |
291 | modded.dx = area->dx; | |
292 | modded.dy = area->dy; | |
293 | modded.width = area->width; | |
294 | modded.height = area->height; | |
295 | ||
296 | if (info->flags & FBINFO_HWACCEL_DISABLED) { | |
297 | sys_copyarea(info, area); | |
298 | return; | |
299 | } | |
300 | ||
301 | vxres = info->var.xres_virtual; | |
302 | vyres = info->var.yres_virtual; | |
303 | ||
304 | if (!modded.width || !modded.height || | |
305 | modded.sx >= vxres || modded.sy >= vyres || | |
306 | modded.dx >= vxres || modded.dy >= vyres) | |
307 | return; | |
308 | ||
309 | if (modded.sx + modded.width > vxres) | |
310 | modded.width = vxres - modded.sx; | |
311 | if (modded.dx + modded.width > vxres) | |
312 | modded.width = vxres - modded.dx; | |
313 | if (modded.sy + modded.height > vyres) | |
314 | modded.height = vyres - modded.sy; | |
315 | if (modded.dy + modded.height > vyres) | |
316 | modded.height = vyres - modded.dy; | |
317 | ||
318 | unifb_prim_copyarea(info, &modded); | |
319 | } | |
320 | ||
321 | static void unifb_imageblit(struct fb_info *info, const struct fb_image *image) | |
322 | { | |
323 | sys_imageblit(info, image); | |
324 | } | |
325 | ||
326 | static u_long get_line_length(int xres_virtual, int bpp) | |
327 | { | |
328 | u_long length; | |
329 | ||
330 | length = xres_virtual * bpp; | |
331 | length = (length + 31) & ~31; | |
332 | length >>= 3; | |
333 | return length; | |
334 | } | |
335 | ||
336 | /* | |
337 | * Setting the video mode has been split into two parts. | |
338 | * First part, xxxfb_check_var, must not write anything | |
339 | * to hardware, it should only verify and adjust var. | |
340 | * This means it doesn't alter par but it does use hardware | |
341 | * data from it to check this var. | |
342 | */ | |
343 | static int unifb_check_var(struct fb_var_screeninfo *var, | |
344 | struct fb_info *info) | |
345 | { | |
346 | u_long line_length; | |
347 | ||
348 | /* | |
349 | * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal! | |
350 | * as FB_VMODE_SMOOTH_XPAN is only used internally | |
351 | */ | |
352 | ||
353 | if (var->vmode & FB_VMODE_CONUPDATE) { | |
354 | var->vmode |= FB_VMODE_YWRAP; | |
355 | var->xoffset = info->var.xoffset; | |
356 | var->yoffset = info->var.yoffset; | |
357 | } | |
358 | ||
359 | /* | |
360 | * Some very basic checks | |
361 | */ | |
362 | if (!var->xres) | |
363 | var->xres = 1; | |
364 | if (!var->yres) | |
365 | var->yres = 1; | |
366 | if (var->xres > var->xres_virtual) | |
367 | var->xres_virtual = var->xres; | |
368 | if (var->yres > var->yres_virtual) | |
369 | var->yres_virtual = var->yres; | |
370 | if (var->bits_per_pixel <= 1) | |
371 | var->bits_per_pixel = 1; | |
372 | else if (var->bits_per_pixel <= 8) | |
373 | var->bits_per_pixel = 8; | |
374 | else if (var->bits_per_pixel <= 16) | |
375 | var->bits_per_pixel = 16; | |
376 | else if (var->bits_per_pixel <= 24) | |
377 | var->bits_per_pixel = 24; | |
378 | else if (var->bits_per_pixel <= 32) | |
379 | var->bits_per_pixel = 32; | |
380 | else | |
381 | return -EINVAL; | |
382 | ||
383 | if (var->xres_virtual < var->xoffset + var->xres) | |
384 | var->xres_virtual = var->xoffset + var->xres; | |
385 | if (var->yres_virtual < var->yoffset + var->yres) | |
386 | var->yres_virtual = var->yoffset + var->yres; | |
387 | ||
388 | /* | |
389 | * Memory limit | |
390 | */ | |
391 | line_length = | |
392 | get_line_length(var->xres_virtual, var->bits_per_pixel); | |
393 | if (line_length * var->yres_virtual > UNIFB_MEMSIZE) | |
394 | return -ENOMEM; | |
395 | ||
396 | /* | |
397 | * Now that we checked it we alter var. The reason being is that the | |
398 | * video mode passed in might not work but slight changes to it might | |
399 | * make it work. This way we let the user know what is acceptable. | |
400 | */ | |
401 | switch (var->bits_per_pixel) { | |
402 | case 1: | |
403 | case 8: | |
404 | var->red.offset = 0; | |
405 | var->red.length = 8; | |
406 | var->green.offset = 0; | |
407 | var->green.length = 8; | |
408 | var->blue.offset = 0; | |
409 | var->blue.length = 8; | |
410 | var->transp.offset = 0; | |
411 | var->transp.length = 0; | |
412 | break; | |
413 | case 16: /* RGBA 5551 */ | |
414 | if (var->transp.length) { | |
415 | var->red.offset = 0; | |
416 | var->red.length = 5; | |
417 | var->green.offset = 5; | |
418 | var->green.length = 5; | |
419 | var->blue.offset = 10; | |
420 | var->blue.length = 5; | |
421 | var->transp.offset = 15; | |
422 | var->transp.length = 1; | |
423 | } else { /* RGB 565 */ | |
424 | var->red.offset = 11; | |
425 | var->red.length = 5; | |
426 | var->green.offset = 5; | |
427 | var->green.length = 6; | |
428 | var->blue.offset = 0; | |
429 | var->blue.length = 5; | |
430 | var->transp.offset = 0; | |
431 | var->transp.length = 0; | |
432 | } | |
433 | break; | |
434 | case 24: /* RGB 888 */ | |
435 | var->red.offset = 0; | |
436 | var->red.length = 8; | |
437 | var->green.offset = 8; | |
438 | var->green.length = 8; | |
439 | var->blue.offset = 16; | |
440 | var->blue.length = 8; | |
441 | var->transp.offset = 0; | |
442 | var->transp.length = 0; | |
443 | break; | |
444 | case 32: /* RGBA 8888 */ | |
445 | var->red.offset = 16; | |
446 | var->red.length = 8; | |
447 | var->green.offset = 8; | |
448 | var->green.length = 8; | |
449 | var->blue.offset = 0; | |
450 | var->blue.length = 8; | |
451 | var->transp.offset = 24; | |
452 | var->transp.length = 8; | |
453 | break; | |
454 | } | |
455 | var->red.msb_right = 0; | |
456 | var->green.msb_right = 0; | |
457 | var->blue.msb_right = 0; | |
458 | var->transp.msb_right = 0; | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
463 | /* | |
464 | * This routine actually sets the video mode. It's in here where we | |
465 | * the hardware state info->par and fix which can be affected by the | |
466 | * change in par. For this driver it doesn't do much. | |
467 | */ | |
468 | static int unifb_set_par(struct fb_info *info) | |
469 | { | |
470 | int hTotal, vTotal, hSyncStart, hSyncEnd, vSyncStart, vSyncEnd; | |
471 | int format; | |
472 | ||
473 | #ifdef CONFIG_PUV3_PM | |
474 | struct clk *clk_vga; | |
475 | u32 pixclk = 0; | |
476 | int i; | |
477 | ||
478 | for (i = 0; i <= 10; i++) { | |
479 | if (info->var.xres == unifb_modes[i].xres | |
480 | && info->var.yres == unifb_modes[i].yres | |
481 | && info->var.upper_margin == unifb_modes[i].upper_margin | |
482 | && info->var.lower_margin == unifb_modes[i].lower_margin | |
483 | && info->var.left_margin == unifb_modes[i].left_margin | |
484 | && info->var.right_margin == unifb_modes[i].right_margin | |
485 | && info->var.hsync_len == unifb_modes[i].hsync_len | |
486 | && info->var.vsync_len == unifb_modes[i].vsync_len) { | |
487 | pixclk = unifb_modes[i].pixclock; | |
488 | break; | |
489 | } | |
490 | } | |
491 | ||
492 | /* set clock rate */ | |
493 | clk_vga = clk_get(info->device, "VGA_CLK"); | |
494 | if (clk_vga == ERR_PTR(-ENOENT)) | |
495 | return -ENOENT; | |
496 | ||
497 | if (pixclk != 0) { | |
498 | if (clk_set_rate(clk_vga, pixclk)) { /* set clock failed */ | |
499 | info->fix = unifb_fix; | |
500 | info->var = unifb_default; | |
501 | if (clk_set_rate(clk_vga, unifb_default.pixclock)) | |
502 | return -EINVAL; | |
503 | } | |
504 | } | |
505 | #endif | |
506 | ||
507 | info->fix.line_length = get_line_length(info->var.xres_virtual, | |
508 | info->var.bits_per_pixel); | |
509 | ||
510 | hSyncStart = info->var.xres + info->var.right_margin; | |
511 | hSyncEnd = hSyncStart + info->var.hsync_len; | |
512 | hTotal = hSyncEnd + info->var.left_margin; | |
513 | ||
514 | vSyncStart = info->var.yres + info->var.lower_margin; | |
515 | vSyncEnd = vSyncStart + info->var.vsync_len; | |
516 | vTotal = vSyncEnd + info->var.upper_margin; | |
517 | ||
518 | switch (info->var.bits_per_pixel) { | |
519 | case 8: | |
520 | format = UDE_CFG_DST8; | |
521 | break; | |
522 | case 16: | |
523 | format = UDE_CFG_DST16; | |
524 | break; | |
525 | case 24: | |
526 | format = UDE_CFG_DST24; | |
527 | break; | |
528 | case 32: | |
529 | format = UDE_CFG_DST32; | |
530 | break; | |
531 | default: | |
532 | return -EINVAL; | |
533 | } | |
534 | ||
6b794743 | 535 | writel(info->fix.smem_start, UDE_FSA); |
ce443ab5 G |
536 | writel(info->var.yres, UDE_LS); |
537 | writel(get_line_length(info->var.xres, | |
538 | info->var.bits_per_pixel) >> 3, UDE_PS); | |
539 | /* >> 3 for hardware required. */ | |
540 | writel((hTotal << 16) | (info->var.xres), UDE_HAT); | |
541 | writel(((hTotal - 1) << 16) | (info->var.xres - 1), UDE_HBT); | |
542 | writel(((hSyncEnd - 1) << 16) | (hSyncStart - 1), UDE_HST); | |
543 | writel((vTotal << 16) | (info->var.yres), UDE_VAT); | |
544 | writel(((vTotal - 1) << 16) | (info->var.yres - 1), UDE_VBT); | |
545 | writel(((vSyncEnd - 1) << 16) | (vSyncStart - 1), UDE_VST); | |
546 | writel(UDE_CFG_GDEN_ENABLE | UDE_CFG_TIMEUP_ENABLE | |
547 | | format | 0xC0000001, UDE_CFG); | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
552 | /* | |
553 | * Set a single color register. The values supplied are already | |
554 | * rounded down to the hardware's capabilities (according to the | |
555 | * entries in the var structure). Return != 0 for invalid regno. | |
556 | */ | |
557 | static int unifb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
558 | u_int transp, struct fb_info *info) | |
559 | { | |
560 | if (regno >= 256) /* no. of hw registers */ | |
561 | return 1; | |
562 | ||
563 | /* grayscale works only partially under directcolor */ | |
564 | if (info->var.grayscale) { | |
565 | /* grayscale = 0.30*R + 0.59*G + 0.11*B */ | |
566 | red = green = blue = | |
567 | (red * 77 + green * 151 + blue * 28) >> 8; | |
568 | } | |
569 | ||
570 | #define CNVT_TOHW(val, width) ((((val)<<(width))+0x7FFF-(val))>>16) | |
571 | switch (info->fix.visual) { | |
572 | case FB_VISUAL_TRUECOLOR: | |
573 | case FB_VISUAL_PSEUDOCOLOR: | |
574 | red = CNVT_TOHW(red, info->var.red.length); | |
575 | green = CNVT_TOHW(green, info->var.green.length); | |
576 | blue = CNVT_TOHW(blue, info->var.blue.length); | |
577 | transp = CNVT_TOHW(transp, info->var.transp.length); | |
578 | break; | |
579 | case FB_VISUAL_DIRECTCOLOR: | |
580 | red = CNVT_TOHW(red, 8); /* expect 8 bit DAC */ | |
581 | green = CNVT_TOHW(green, 8); | |
582 | blue = CNVT_TOHW(blue, 8); | |
583 | /* hey, there is bug in transp handling... */ | |
584 | transp = CNVT_TOHW(transp, 8); | |
585 | break; | |
586 | } | |
587 | #undef CNVT_TOHW | |
588 | /* Truecolor has hardware independent palette */ | |
589 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { | |
590 | u32 v; | |
591 | ||
592 | if (regno >= 16) | |
593 | return 1; | |
594 | ||
595 | v = (red << info->var.red.offset) | | |
596 | (green << info->var.green.offset) | | |
597 | (blue << info->var.blue.offset) | | |
598 | (transp << info->var.transp.offset); | |
599 | switch (info->var.bits_per_pixel) { | |
600 | case 8: | |
601 | break; | |
602 | case 16: | |
603 | case 24: | |
604 | case 32: | |
605 | ((u32 *) (info->pseudo_palette))[regno] = v; | |
606 | break; | |
607 | default: | |
608 | return 1; | |
609 | } | |
610 | return 0; | |
611 | } | |
612 | return 0; | |
613 | } | |
614 | ||
615 | /* | |
616 | * Pan or Wrap the Display | |
617 | * | |
618 | * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag | |
619 | */ | |
620 | static int unifb_pan_display(struct fb_var_screeninfo *var, | |
621 | struct fb_info *info) | |
622 | { | |
623 | if (var->vmode & FB_VMODE_YWRAP) { | |
624 | if (var->yoffset < 0 | |
625 | || var->yoffset >= info->var.yres_virtual | |
626 | || var->xoffset) | |
627 | return -EINVAL; | |
628 | } else { | |
465cb7e7 LP |
629 | if (var->xoffset + info->var.xres > info->var.xres_virtual || |
630 | var->yoffset + info->var.yres > info->var.yres_virtual) | |
ce443ab5 G |
631 | return -EINVAL; |
632 | } | |
633 | info->var.xoffset = var->xoffset; | |
634 | info->var.yoffset = var->yoffset; | |
635 | if (var->vmode & FB_VMODE_YWRAP) | |
636 | info->var.vmode |= FB_VMODE_YWRAP; | |
637 | else | |
638 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
639 | return 0; | |
640 | } | |
641 | ||
642 | int unifb_mmap(struct fb_info *info, | |
643 | struct vm_area_struct *vma) | |
644 | { | |
ce443ab5 G |
645 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
646 | ||
7b3d1c82 | 647 | return vm_iomap_memory(vma, info->fix.smem_start, info->fix.smem_len); |
ce443ab5 G |
648 | } |
649 | ||
650 | static struct fb_ops unifb_ops = { | |
651 | .fb_read = fb_sys_read, | |
652 | .fb_write = fb_sys_write, | |
653 | .fb_check_var = unifb_check_var, | |
654 | .fb_set_par = unifb_set_par, | |
655 | .fb_setcolreg = unifb_setcolreg, | |
656 | .fb_pan_display = unifb_pan_display, | |
657 | .fb_fillrect = unifb_fillrect, | |
658 | .fb_copyarea = unifb_copyarea, | |
659 | .fb_imageblit = unifb_imageblit, | |
660 | .fb_mmap = unifb_mmap, | |
661 | }; | |
662 | ||
663 | /* | |
664 | * Initialisation | |
665 | */ | |
666 | static int unifb_probe(struct platform_device *dev) | |
667 | { | |
668 | struct fb_info *info; | |
669 | u32 unifb_regs[UNIFB_REGS_NUM]; | |
670 | int retval = -ENOMEM; | |
6b794743 GX |
671 | struct resource *iomem; |
672 | void *videomemory; | |
673 | ||
674 | videomemory = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP, | |
675 | get_order(UNIFB_MEMSIZE)); | |
676 | if (!videomemory) | |
677 | goto err; | |
678 | ||
679 | memset(videomemory, 0, UNIFB_MEMSIZE); | |
680 | ||
681 | unifb_fix.smem_start = virt_to_phys(videomemory); | |
682 | unifb_fix.smem_len = UNIFB_MEMSIZE; | |
683 | ||
684 | iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
685 | unifb_fix.mmio_start = iomem->start; | |
ce443ab5 G |
686 | |
687 | info = framebuffer_alloc(sizeof(u32)*256, &dev->dev); | |
688 | if (!info) | |
689 | goto err; | |
690 | ||
6b794743 | 691 | info->screen_base = (char __iomem *)videomemory; |
ce443ab5 G |
692 | info->fbops = &unifb_ops; |
693 | ||
694 | retval = fb_find_mode(&info->var, info, NULL, | |
695 | unifb_modes, 10, &unifb_modes[0], 16); | |
696 | ||
697 | if (!retval || (retval == 4)) | |
698 | info->var = unifb_default; | |
699 | ||
ce443ab5 G |
700 | info->fix = unifb_fix; |
701 | info->pseudo_palette = info->par; | |
702 | info->par = NULL; | |
703 | info->flags = FBINFO_FLAG_DEFAULT; | |
704 | #ifdef FB_ACCEL_PUV3_UNIGFX | |
705 | info->fix.accel = FB_ACCEL_PUV3_UNIGFX; | |
706 | #endif | |
707 | ||
708 | retval = fb_alloc_cmap(&info->cmap, 256, 0); | |
709 | if (retval < 0) | |
710 | goto err1; | |
711 | ||
712 | retval = register_framebuffer(info); | |
713 | if (retval < 0) | |
714 | goto err2; | |
715 | platform_set_drvdata(dev, info); | |
716 | platform_device_add_data(dev, unifb_regs, sizeof(u32) * UNIFB_REGS_NUM); | |
717 | ||
31b6780c JP |
718 | fb_info(info, "Virtual frame buffer device, using %dM of video memory\n", |
719 | UNIFB_MEMSIZE >> 20); | |
ce443ab5 G |
720 | return 0; |
721 | err2: | |
722 | fb_dealloc_cmap(&info->cmap); | |
723 | err1: | |
724 | framebuffer_release(info); | |
725 | err: | |
726 | return retval; | |
727 | } | |
728 | ||
729 | static int unifb_remove(struct platform_device *dev) | |
730 | { | |
731 | struct fb_info *info = platform_get_drvdata(dev); | |
732 | ||
733 | if (info) { | |
734 | unregister_framebuffer(info); | |
735 | fb_dealloc_cmap(&info->cmap); | |
736 | framebuffer_release(info); | |
737 | } | |
738 | return 0; | |
739 | } | |
740 | ||
741 | #ifdef CONFIG_PM | |
742 | static int unifb_resume(struct platform_device *dev) | |
743 | { | |
744 | int rc = 0; | |
745 | u32 *unifb_regs = dev->dev.platform_data; | |
746 | ||
747 | if (dev->dev.power.power_state.event == PM_EVENT_ON) | |
748 | return 0; | |
749 | ||
750 | console_lock(); | |
751 | ||
752 | if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND) { | |
753 | writel(unifb_regs[0], UDE_FSA); | |
754 | writel(unifb_regs[1], UDE_LS); | |
755 | writel(unifb_regs[2], UDE_PS); | |
756 | writel(unifb_regs[3], UDE_HAT); | |
757 | writel(unifb_regs[4], UDE_HBT); | |
758 | writel(unifb_regs[5], UDE_HST); | |
759 | writel(unifb_regs[6], UDE_VAT); | |
760 | writel(unifb_regs[7], UDE_VBT); | |
761 | writel(unifb_regs[8], UDE_VST); | |
762 | writel(unifb_regs[9], UDE_CFG); | |
763 | } | |
764 | dev->dev.power.power_state = PMSG_ON; | |
765 | ||
766 | console_unlock(); | |
767 | ||
768 | return rc; | |
769 | } | |
770 | ||
771 | static int unifb_suspend(struct platform_device *dev, pm_message_t mesg) | |
772 | { | |
773 | u32 *unifb_regs = dev->dev.platform_data; | |
774 | ||
775 | unifb_regs[0] = readl(UDE_FSA); | |
776 | unifb_regs[1] = readl(UDE_LS); | |
777 | unifb_regs[2] = readl(UDE_PS); | |
778 | unifb_regs[3] = readl(UDE_HAT); | |
779 | unifb_regs[4] = readl(UDE_HBT); | |
780 | unifb_regs[5] = readl(UDE_HST); | |
781 | unifb_regs[6] = readl(UDE_VAT); | |
782 | unifb_regs[7] = readl(UDE_VBT); | |
783 | unifb_regs[8] = readl(UDE_VST); | |
784 | unifb_regs[9] = readl(UDE_CFG); | |
785 | ||
786 | if (mesg.event == dev->dev.power.power_state.event) | |
787 | return 0; | |
788 | ||
789 | switch (mesg.event) { | |
790 | case PM_EVENT_FREEZE: /* about to take snapshot */ | |
791 | case PM_EVENT_PRETHAW: /* before restoring snapshot */ | |
792 | goto done; | |
793 | } | |
794 | ||
795 | console_lock(); | |
796 | ||
797 | /* do nothing... */ | |
798 | ||
799 | console_unlock(); | |
800 | ||
801 | done: | |
802 | dev->dev.power.power_state = mesg; | |
803 | ||
804 | return 0; | |
805 | } | |
806 | #else | |
807 | #define unifb_resume NULL | |
808 | #define unifb_suspend NULL | |
809 | #endif | |
810 | ||
811 | static struct platform_driver unifb_driver = { | |
812 | .probe = unifb_probe, | |
813 | .remove = unifb_remove, | |
814 | .resume = unifb_resume, | |
815 | .suspend = unifb_suspend, | |
816 | .driver = { | |
817 | .name = "PKUnity-v3-UNIGFX", | |
818 | }, | |
819 | }; | |
820 | ||
821 | static int __init unifb_init(void) | |
822 | { | |
823 | #ifndef MODULE | |
824 | if (fb_get_options("unifb", NULL)) | |
825 | return -ENODEV; | |
826 | #endif | |
827 | ||
828 | return platform_driver_register(&unifb_driver); | |
829 | } | |
830 | ||
831 | module_init(unifb_init); | |
832 | ||
833 | static void __exit unifb_exit(void) | |
834 | { | |
835 | platform_driver_unregister(&unifb_driver); | |
836 | } | |
837 | ||
838 | module_exit(unifb_exit); | |
839 | ||
840 | MODULE_LICENSE("GPL v2"); |